60
Maintenance and Storage
Sensor Module
Ammonium, chloride and nitrate sensors feature user-replaceable sensor modules. These modules contain a reference
solution that depletes over time. The warranty period for ISE modules is 6 months:
• Replacement Nitrate Module [SKU: 626965] =
6
months
• Replacement Ammonium Module [SKU: 626966] =
6
months
• Replacement Chloride Module [SKU: 626967] =
6
months
Depending on usage and storage practices, the module may last longer than its warranty period. When it is time,
perform a sensor module replacement in a clean, dry laboratory environment.
Figure 80
ISE long-term storage
Long-term Storage:
Remove the sensor from the bulkhead and plug the bulkhead port.
Insert the sensor tip into the storage bottle with a small amount of
high-calibration solution or tap water. The sensor tip should not be
submerged. The storage bottle features an open cap and o-ring to form a
tight seal around the sensor tip (
Figure 80
).
NOTICE:
Do NOT let the sensor dry out. Do NOT store the ISE
sensor in conductivity standard, pH buffer, or salt water.
Either of these will radically shorten the lifespan or kill
the sensor module and void its warranty.
Rehydrating the Reference Junction
If an ISE module has been allowed to dry, soak the sensor for several
hours (preferably overnight) in the sensor’s high-calibration solution. If the
sensor is irreparably damaged, the sensor module must be replaced.
ISE Sensor Maintenance and Storage
(continued)
